rsi: resolve power save issue after S4 resume

We are redownloading the firmware after S4 restore and observed in
stress test that mac80211 sometimes gives power save request after
resume which causes the firmware in bad state. mac_ops_resumed flag
is added to skip that request until initialisation is done and Keeping
power save state is NONE.

Signed-off-by: Siva Rebbagondla <siva.rebbagondla@redpinesignals.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --git a/drivers/net/wireless/rsi/rsi_91x_mac80211.c b/drivers/net/wireless/rsi/rsi_91x_mac80211.c
index 8d1282f..7bc8da6 100644 (file)
--- a/drivers/net/wireless/rsi/rsi_91x_mac80211.c
+++ b/drivers/net/wireless/rsi/rsi_91x_mac80211.c
@@ -239,6 +239,7 @@ static int rsi_mac80211_hw_scan_start(struct ieee80211_hw *hw,
        struct ieee80211_bss_conf *bss = &vif->bss_conf;
 
        rsi_dbg(INFO_ZONE, "***** Hardware scan start *****\n");
+       common->mac_ops_resumed = false;
 
        if (common->fsm_state != FSM_MAC_INIT_DONE)
                return -ENODEV;
@@ -370,6 +371,10 @@ static void rsi_mac80211_tx(struct ieee80211_hw *hw,
 {
        struct rsi_hw *adapter = hw->priv;
        struct rsi_common *common = adapter->priv;
+       struct ieee80211_hdr *wlh = (struct ieee80211_hdr *)skb->data;
+
+       if (ieee80211_is_auth(wlh->frame_control))
+               common->mac_ops_resumed = false;
 
        rsi_core_xmit(common, skb);
 }
@@ -677,7 +682,8 @@ static int rsi_mac80211_config(struct ieee80211_hw *hw,
        }
 
        /* Power save parameters */
-       if (changed & IEEE80211_CONF_CHANGE_PS) {
+       if ((changed & IEEE80211_CONF_CHANGE_PS) &&
+           !common->mac_ops_resumed) {
                struct ieee80211_vif *vif, *sta_vif = NULL;
                unsigned long flags;
                int i, set_ps = 1;
@@ -1939,6 +1945,7 @@ static int rsi_mac80211_resume(struct ieee80211_hw *hw)
        rsi_dbg(INFO_ZONE, "%s: mac80211 resume\n", __func__);
 
        if (common->hibernate_resume) {
+               common->mac_ops_resumed = true;
                /* Device need a complete restart of all MAC operations.
                 * returning 1 will serve this purpose.
                 */

diff --git a/drivers/net/wireless/rsi/rsi_91x_sdio.c b/drivers/net/wireless/rsi/rsi_91x_sdio.c
index 449803c..764ad06 100644 (file)
--- a/drivers/net/wireless/rsi/rsi_91x_sdio.c
+++ b/drivers/net/wireless/rsi/rsi_91x_sdio.c
@@ -1396,6 +1396,7 @@ static int rsi_restore(struct device *dev)
        common->iface_down = true;
 
        adapter->sc_nvifs = 0;
+       adapter->ps_state = PS_NONE;
 
        common->wow_flags = 0;
        common->iface_down = false;

diff --git a/drivers/net/wireless/rsi/rsi_main.h b/drivers/net/wireless/rsi/rsi_main.h
index 4dc0c01..35d13f3 100644 (file)
--- a/drivers/net/wireless/rsi/rsi_main.h
+++ b/drivers/net/wireless/rsi/rsi_main.h
@@ -311,6 +311,7 @@ struct rsi_common {
        struct cfg80211_scan_request *hwscan;
        struct rsi_bgscan_params bgscan;
        u8 bgscan_en;
+       u8 mac_ops_resumed;
 };
 
 struct eepromrw_info {